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Date: Thu, 5 Jun 2014 12:18:06 -0700 From: Cong Wang <cwang@...pensource.com> To: Alex <d77190@...l.ru> Cc: netdev <netdev@...r.kernel.org> Subject: Re: Bug 75571 On Wed, Jun 4, 2014 at 10:22 PM, Alex <d77190@...l.ru> wrote: > В Ср, 04/06/2014 в 17:27 -0700, Cong Wang пишет: > >> Thanks for testing! >> >> Thinking a bit more, the question is why >> skb_push(skb->dev->hard_header_len) is not correct here? It looks >> like we don't calculate tunnel->dev->hard_header_len correctly. But >> ipip_tunnel_bind_dev() should do the right thing less your setup is not >> correct, in that case your ipip tunnel should not receive any packet. >> We should be safe. >> >> Which is the interface routing to 192.168.18.17 on your system? Which >> driver does it use? > > Its a stock e1000e from kernel with no special options. No jumbo frames, > etc. > > lspci says: > Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet > Controller (Copper) (rev 06) > > IPIP tunnel runs on top of this interface. > Hmm, e1000e should init dev->hard_header_len to ETH_LEN, which is 14. Plus IPv4 header len (20), it should be about 34. I don't understand why the ipip tunnel's hard_header_len is 148 in your case. It is only possible when there is no underlying interface, that is, LL_MAX_HEADER + sizeof(struct iphdr). What do `ip -d link show` and `ip route show` say? -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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